J/ApJS/166/211ivo://CDS.VizieR/J/ApJS/166/211doi:10.26093/cds/vizier.21660211CDSZezas A.Fabbiano G.Baldi A.Schweizer F.King A.R.Ponman T.J.,Rots A.H.2008-07-07T22:10:00Z2008-07-07T22:03:27ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frx-ray-sourcesWe present the properties of the discrete X-ray sources detected in our monitoring survey of the Antennae galaxies with Chandra ACIS-S. We detect ~70 sources down to a typical luminosity of 7x10^37^ergs/s in each of the six monitoring observations. In the co-added observation (which has a total exposure of 411ks) we detect a total of 120 sources down to a luminosity of (2-5)x10^37^ergs/s, depending on the local background. Fifteen sources have a strong extended component. Fourteen of the pointlike sources have luminosities above 10^39^ergs/s, at least in one exposure, which qualifies them as ultraluminous X-ray sources (ULXs). Ten of the ULXs show long-term variability, while one is observed only once, suggesting that it is a transient source. We find that 25 sources exhibit long-term variability clearly associating them with accreting compact objects. Twenty-one sources also show spectral variability. However, their variability patterns are diverse, indicating that they belong to different source classes. Finally, we find a weak excess of hard sources at the low luminosities that we tentatively associate with pulsar X-ray binaries.2006ApJS..166..211Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/166/211CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/109/960 : Young star clusters in The Antennae (Whitmore+ 1995)J/ApJ/561/727 : BVI photometry in the Antennae galaxies (Zhang+, 2001)J/AJ/124/1418 : Radio-optical identification of star clusters (Whitmore+ 2002)J/ApJ/599/1049 : Supergiant molecular complexes in the Antennae (Wilson+, 2003)J/AJ/127/660 : Photometry in southern tail of the Antennae (Saviane+, 2004)J/ApJ/635/280 : Star clusters in the Antennae galaxies (Brandl+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/166/211https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/166/211http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/166/211https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/166/211https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/166/211http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/166/211GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/166/211/table5 (Source Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/166/211/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/166/211/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/166/211/table5?GETtext/xml+votable180.050000true180.4375-18.8845560.005555555555555556Cone search capability for table J/ApJS/166/211/table3 (Source and background apertures)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/166/211/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/166/211/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/166/211/table3?GETtext/xml+votable180.050000true180.43775-18.88455560.0055555555555555566/25344https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/166/211?format=asciiX-raydefaultJ/ApJS/166/211/table5Source CatalogExt[Y? ] Extended?meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[ZFB2006]Source number (1)meta.id;meta.maincharprimary[ZFR2002]? Source number from Paper II, Zezas et al., 2002ApJS..142..239Zmeta.idintnullableCXCCXC source name (HHMMSS.s+DDMMSS) (3)meta.idcharRAJ2000Hour of Right Ascension (J2000) (4)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (4)pos.eq.dec;meta.mainOCtsFull band (0.3-7.0keV) observed counts (5)ctphot.count;em.X-rayfloate_OCtsUncertainty in OCts (5)ctstat.errorfloatBCtsFull band background counts (5)ctphot.count;em.X-raydoubleApR? Background to source aperture area ratiophot.count;arith.ratiofloatnullablelogX? Log of 0.1-10keV source luminosity (6)log(1e-07W)phys.luminosity;em.X-rayfloatnullablee_logX? Error in logXlog(1e-07W)stat.error;pos.cartesian.xfloatnullableSigSignificance in {sigma} above local backgroundstat.fit.goodnessfloatf_Sig[B] Indicates Sig>3{sigma}meta.codecharVar[LSTV?, ] Variable? (7)meta.code;src.varcharJ/ApJS/166/211/table13Source properties: Combined ObservationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[ZFB2006]Source numbermeta.id;meta.maincharFOCtsThe 0.3-7keV observed counts (1)ctphot.count;em.X-rayfloate_FOCtsError in FOCtsctstat.errorfloatFBCtsThe 0.3-7keV background counts (2)ctphot.count;em.X-rayfloatFAreaThe 0.3-7keV effective area relative to observation 2 (3)phys.area;instrfloatSOCtsThe 0.3-1.0keV observed counts (1)ctphot.count;em.X-rayfloate_SOCtsError in SOCtsctstat.errorfloatSBCtsThe 0.3-1.0keV background counts (2)ctphot.count;em.X-rayfloatSAreaThe 0.3-1.0keV effective area relative to observation 2 (3)phys.areafloatMOCtsThe 1.0-2.5keV observed counts (1)ctphot.count;em.X-rayfloate_MOCtsError in MOCtsctstat.errorfloatMBCtsThe 1.0-2.5keV background counts (2)ctphot.count;em.X-rayfloatMAreaThe 1.0-2.5keV effective area relative to observation 2 (3)phys.areafloatHOCtsThe 2.5-7keV observed counts (1)ctphot.count;em.X-rayfloate_HBCtsError in HBCtsctstat.errorfloatHBCtsThe 2.5-7keV background counts (2)ctphot.count;em.X-rayfloatHAreaThe 2.5-7keV effective area relative to observation 2 (3)phys.areafloatSigSignificance in {sigma} above local backgroundstat.fit.goodnessfloatf_Sig[B] Indicates Sig>|3{sigma}|meta.codecharVar? Variability significance in {sigma} (4)stat.fit.goodnessfloatnullablef_Var[B] Indicates Var>|3{sigma}|meta.codecharlogX? Log of the 0.1-10keV absorption corrected luminosity (5)log(1e-07W)phys.luminosity;em.X-rayfloatnullablee_logX? Error in LogXlog(1e-07W)stat.error;pos.cartesian.xfloatnullableAllDisplay the individual data for the 7 observationsmeta.ref.urlcharJ/ApJS/166/211/table21Hardness Ratios: Coadded ObservationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[ZFB2006]Source numbermeta.id;meta.maincharHR1? Standard (M-S)/(M+S) hardness ratio (1)phot.flux;arith.ratiofloatnullablee_HR1? Error in HR1stat.errorfloatnullableHR2? Standard (H-M)/(H+M) hardness ratio (1)phot.flux;arith.ratiofloatnullablee_HR2? Error in HR2stat.errorfloatnullableHR3? Standard (H-S)/(H+S) hardness ratio (1)phot.flux;arith.ratiofloatnullablee_HR3? Error in HR3stat.errorfloatnullableBHR1? Bayesian method (M-S)/(M+S) hardness ratio (1)phot.flux;arith.ratiofloatnullableE_BHR1? Upper 1{sigma} interval in BHR1stat.error;stat.maxfloatnullablee_BHR1? Lower 1{sigma} interval in BHR1stat.errorfloatnullableBHR2? Bayesian method (H-M)/(H+M) hardness ratio (1)phot.flux;arith.ratiofloatnullableE_BHR2? Upper 1{sigma} interval in BHR2stat.error;stat.maxfloatnullablee_BHR2? Lower 1{sigma} interval in BHR2stat.errorfloatnullableBHR3? Bayesian method (H-S)/(H+S) hardness ratio (1)phot.flux;arith.ratiofloatnullableE_BHR3? Upper 1{sigma} interval in BHR3stat.error;stat.maxfloatnullablee_BHR3? Lower 1{sigma} interval in BHR3stat.errorfloatnullableC1? Bayesian method S/M color (1)phot.count;em.X-rayfloatnullableE_C1? Upper 1{sigma} interval in C1stat.error;stat.maxfloatnullablee_C1? Lower 1{sigma} interval in C1stat.errorfloatnullableC2? Bayesian method M/H color (1)phot.count;em.X-rayfloatnullableE_C2? Upper 1{sigma} interval in C2stat.error;stat.maxfloatnullablee_C2? Lower 1{sigma} interval in C2stat.errorfloatnullableC3? Bayesian method S/H color (1)phot.count;em.X-rayfloatnullableE_C3? Upper 1{sigma} interval in C3stat.error;stat.maxfloatnullablee_C3? Lower 1{sigma} interval in C3stat.errorfloatnullableAllDisplay the individual data for the 7 observationsmeta.ref.urlcharJ/ApJS/166/211/table3Source and background apertures[ZFB2006]Source numbermeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_[ZFB2006][ab] Note on [ZFB2006] (1)meta.notecharRAJ2000Source aperture Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Source aperture Declination (J2000)pos.eq.dec;meta.mainMajAxisSource aperture semi-major axisarcsecphys.angSizefloatMinAxisSource aperture semi-minor axisarcsecphys.angSize.sminAxis;instr.fovfloatPASource aperture position angledegpos.posAng;instr.fovfloatBRABackground aperture Right Ascension (J2000)pos.eq.raBDEBackground aperture Declination (J2000)pos.eq.decBMaj? Background aperture semi-major axisarcsecphys.angSizefloatnullableBMin? Background aperture semi-minor axisarcsecphys.angSize.sminAxis;instr.fovfloatnullableBPA? Background aperture position angledegpos.posAng;instr.fovfloatnullableJ/ApJS/166/211/table1Observation LogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsObservation numbermeta.idintprimaryObsIDChandra observation IDmeta.id;obsintObs.DateObservation datetime.epoch;obsnullableExpTimeNet exposure timestime.duration;obs.exposure;src.netfloatJ/ApJS/166/211/hrHardness ratios for observations 1-7Obsobservation numbermeta.id;obscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[ZFB2006]Source numbermeta.id;meta.maincharHR1? Standard (M-S)/(M+S) hardness ratio (1)phot.flux;arith.ratiofloatnullablee_HR1? Error in HR1stat.errorfloatnullableHR2? Standard (H-M)/(H+M) hardness ratio (1)phot.flux;arith.ratiofloatnullablee_HR2? Error in HR2stat.errorfloatnullableHR3? Standard (H-S)/(H+S) hardness ratio (1)phot.flux;arith.ratiofloatnullablee_HR3? Error in HR3stat.errorfloatnullableBHR1? Bayesian method (M-S)/(M+S) hardness ratio (1)phot.flux;arith.ratiofloatnullableE_BHR1? Upper 1{sigma} interval in BHR1stat.error;stat.maxfloatnullablee_BHR1? Lower 1{sigma} interval in BHR1stat.errorfloatnullableBHR2? Bayesian method (H-M)/(H+M) hardness ratio (1)phot.flux;arith.ratiofloatnullableE_BHR2? Upper 1{sigma} interval in BHR2stat.error;stat.maxfloatnullablee_BHR2? Lower 1{sigma} interval in BHR2stat.errorfloatnullableBHR3? Bayesian method (H-S)/(H+S) hardness ratio (1)phot.flux;arith.ratiofloatnullableE_BHR3? Upper 1{sigma} interval in BHR3stat.error;stat.maxfloatnullablee_BHR3? Lower 1{sigma} interval in BHR3stat.errorfloatnullableC1? Bayesian method S/M color (1)phot.count;em.X-rayfloatnullableE_C1? Upper 1{sigma} interval in C1stat.error;stat.maxfloatnullablee_C1? Lower 1{sigma} interval in C1stat.errorfloatnullableC2? Bayesian method M/H color (1)phot.count;em.X-rayfloatnullableE_C2? Upper 1{sigma} interval in C2stat.error;stat.maxfloatnullablee_C2? Lower 1{sigma} interval in C2stat.errorfloatnullableC3? Bayesian method S/H color (1)phot.count;em.X-rayfloatnullableE_C3? Upper 1{sigma} interval in C3stat.error;stat.maxfloatnullablee_C3? Lower 1{sigma} interval in C3stat.errorfloatnullableJ/ApJS/166/211/table22Antennae Sources: Radial Profile fits[ZFB2006]Source namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPSFCash statistic for fit of the source radial profile with model PSFstat.fit.paramfloatdofPSFDegrees of freedom on PSFstat.fit.dof;instr.det.psfintl_FWHMLimit flag on FWHMmeta.code.error;phys.angSizecharFWHMFWHM of radial profile fit with Gaussian plus backgroundpixinstr.background;meta.modelledfloate_FWHM? Lower limit error in FWHMpixstat.error;phys.angSizefloatnullableE_FWHM? Upper limit error in FWHM (1)pixstat.error;stat.maxfloatnullableBgrBackground for radial profile fit with Gaussian plus backgroundct/pixstat.fit.paramfloate_BgrLower limit error in Bgrct/pixstat.errorfloatE_Bgr? Upper limit error in Bgr (1)ct/pixstat.error;stat.maxfloatnullableGaussCash statistic for radial profile fit with Gaussian plus background modelstat.fit.paramfloatdofGaussDegrees of freedom on Gaussstat.fit.dofintFWHMc? Core FWHM of radial profile fit with Double Gaussianpixphys.angSize;meta.modelledfloatnullablee_FWHMc? Lower limit error in FWHMcpixstat.errorfloatnullableE_FWHMc? Upper limit error in FWHMc (1)pixstat.error;stat.maxfloatnullableFWHMw? Wing FWHM of radial profile fit with Double Gaussianct/pixphys.angSizefloatnullablee_FWHMw? Lower limit error in FWHMwct/pixstat.errorfloatnullableE_FWHMw? Upper limit error in FWHMw (1)ct/pixstat.error;stat.maxfloatnullableGauss1? Cash statistic for radial profile fit with Double Gaussian modelstat.fit.paramfloatnullabledofGauss1? Degrees of freedom on Gauss1stat.fit.dofintnullableNote[ANSd] Additional note (2)meta.notecharJ/ApJS/166/211/propSources properties for observations 1-7recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsobservation numbermeta.id;obschar[ZFB2006]Source numbermeta.id;meta.maincharFOCtsThe 0.3-7keV observed counts (1)ctphot.count;em.X-rayfloate_FOCtsError in FOCtsctstat.errorfloatFBCtsThe 0.3-7keV background counts (2)ctphot.count;em.X-rayfloatFAreaThe 0.3-7keV effective area relative to observation 2 (3)phys.area;instrfloatSOCtsThe 0.3-1.0keV observed counts (1)ctphot.count;em.X-rayfloate_SOCtsError in SOCtsctstat.errorfloatSBCtsThe 0.3-1.0keV background counts (2)ctphot.count;em.X-rayfloatSAreaThe 0.3-1.0keV effective area relative to observation 2 (3)phys.areafloatMOCtsThe 1.0-2.5keV observed counts (1)ctphot.count;em.X-rayfloate_MOCtsError in MOCtsctstat.errorfloatMBCtsThe 1.0-2.5keV background counts (2)ctphot.count;em.X-rayfloatMAreaThe 1.0-2.5keV effective area relative to observation 2 (3)phys.areafloatHOCtsThe 2.5-7keV observed counts (1)ctphot.count;em.X-rayfloate_HBCtsError in HBCtsctstat.errorfloatHBCtsThe 2.5-7keV background counts (2)ctphot.count;em.X-rayfloatHAreaThe 2.5-7keV effective area relative to observation 2 (3)phys.areafloatSigSignificance in {sigma} above local backgroundstat.fit.goodnessfloatf_Sig[B] Indicates Sig>|3{sigma}|meta.codecharVar? Variability significance in {sigma} (4)stat.fit.goodnessfloatnullablef_Var[B] Indicates Var>|3{sigma}|meta.codecharlogX? Log of the 0.1-10keV absorption corrected luminosity (5)log(1e-07W)phys.luminosity;em.X-rayfloatnullablee_logX? Error in LogXlog(1e-07W)stat.error;pos.cartesian.xfloatnullable